A method, device and electronic device for determining the carbon loading of a DPF model

Abstract

The present invention discloses a method, device and electronic device for determining the carbon loading of a DPF model. The method includes: when it is determined that the far post-injection is turned on, first, in a first preset correspondence, determine a first NO2 occupancy ratio after DOC corresponding to the current DOC temperature and the current DOC space velocity, then calculate a first passive regeneration carbon consumption amount based on the first NO2 occupancy ratio after DOC, calculate an increase value of the first DPF model carbon loading based on the carbon deposit amount, the first passive regeneration carbon consumption amount and the active regeneration carbon consumption amount, and finally use the sum of the current DPF model carbon loading and the increase value of the first DPF model carbon loading as the target DPF model carbon loading. Since the first passive regeneration carbon consumption amount is calculated based on the first NO2 occupancy ratio after DOC corresponding to the current DOC temperature and the current DOC space velocity, compared with calculating the passive regeneration carbon consumption amount using the theoretical NO2 occupancy ratio, the accuracy of the DPF model carbon loading can be improved, and the probability of the DPF being blocked or burned can be reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of exhaust gas post-treatment, and particularly to a method, device and electronic device for determining the carbon loading of a DPF model. Background Art

[0002] The direct emission of diesel engine exhaust gas will cause great pollution to the air. In the prior art, DOC (Diesel Oxidation Catalyst), DPF (Diesel Particulate Filter) and SCR (Selective Catalytic Reduction) catalysts are usually used to treat the exhaust gas in sequence to reduce the content of pollutants in the exhaust gas.

[0003] Currently, during the DPF regeneration process, diesel is injected by far post-injection. The diesel will oxidize and burn in the DOC, thereby increasing the temperature of the DPF. The diesel injected during the regeneration process will affect the conversion efficiency of NO2 (nitrogen dioxide) in the DOC, seriously affecting the reaction between NO2 and C (carbon), resulting in a decrease in the proportion of NO2 in the DOC. The decrease in the proportion of NO2 in the DOC leads to the actual NO2 proportion being lower than the theoretical NO2 proportion, thereby causing the actual passive regeneration decarbonization amount to be less than the passive regeneration decarbonization amount calculated based on the theoretical NO2 proportion, and ultimately resulting in the actual carbon loading in the DPF being higher than the model carbon loading calculated by the DPF carbon loading model, which is likely to cause problems such as DPF blockage or burning. Summary of the Invention

[0004] The present invention provides a method, device and electronic device for determining the carbon loading of a DPF model to solve the problem in the prior art that due to the decrease in the proportion of NO2 in the DOC, the model value of the carbon loading is lower than the actual carbon loading, resulting in DPF blockage or burning.

[0005] In a first aspect, the present application provides a method for determining the carbon loading of a DPF model, the method comprising:

[0006] When it is determined that the far post-injection is turned on, in a first preset correspondence, determine a first NO2 proportion value after the DOC corresponding to the current DOC temperature and the current DOC space velocity;

[0007] Based on the first NO2 proportion value after the DOC, calculate a first passive regeneration decarbonization amount;

[0008] Based on the carbon deposit amount, the first passive regeneration decarbonization amount and the active regeneration decarbonization amount, calculate a first DPF model carbon loading increase value;

[0009] Use the sum of the current DPF model carbon loading and the increase in the first DPF model carbon loading as the target DPF model carbon loading.

[0010] In a possible implementation, calculating the first passive regeneration carbon consumption amount based on the NO2 occupancy ratio after the first DOC includes:

[0011] Calculate the first passive regeneration carbon consumption rate based on the NO2 occupancy ratio after the first DOC;

[0012] Use the product of the first passive regeneration carbon consumption rate and a preset time duration as the first passive regeneration carbon consumption amount.

[0013] In a possible implementation, calculating the first passive regeneration carbon consumption amount based on the NO2 occupancy ratio after the first DOC includes:

[0014] Determine the NO2 occupancy ratio after the second DOC corresponding to the current DOC temperature and the current DOC space velocity in a second preset correspondence;

[0015] Calculate a correction factor based on the NO2 occupancy ratio after the second DOC and the NO2 occupancy ratio after the first DOC;

[0016] Calculate the first passive regeneration carbon consumption amount based on the second passive regeneration carbon consumption rate and the correction factor, where the second passive regeneration carbon consumption rate is calculated based on the NO2 occupancy ratio after the second DOC.

[0017] In a possible implementation, calculating the correction factor based on the NO2 occupancy ratio after the second DOC and the NO2 occupancy ratio after the first DOC includes:

[0018] Calculate the ratio of the NO2 occupancy ratio after the first DOC to the NO2 occupancy ratio after the second DOC;

[0019] Use the calculated ratio as the correction factor.

[0020] In a possible implementation, calculating the first passive regeneration carbon consumption amount based on the second passive regeneration carbon consumption rate and the correction factor includes:

[0021] Use the product of the second passive regeneration carbon consumption rate and the correction factor as the first passive regeneration carbon consumption rate;

[0022] Use the product of the first passive regeneration carbon consumption rate and a preset time duration as the first passive regeneration carbon consumption amount.

[0023] In a possible implementation, calculating the first DPF model carbon loading increase value based on the carbon deposit amount, the first passive regeneration decarbonization amount, and the active regeneration decarbonization amount includes:

[0024] Calculating a first difference between the carbon deposit amount and the first passive regeneration decarbonization amount;

[0025] Taking a second difference between the first difference and the active regeneration decarbonization amount as the first DPF model carbon loading increase value.

[0026] In a possible implementation, the method further includes:

[0027] When it is determined that the far post-injection is not enabled, in the second preset correspondence, determining a second NO2 occupancy ratio after the current DOC corresponding to the current DOC temperature and the current DOC airspeed;

[0028] Calculating a second passive regeneration decarbonization amount based on the second NO2 occupancy ratio after the current DOC;

[0029] Calculating a second DPF model carbon loading increase value based on the carbon deposit amount, the second passive regeneration decarbonization amount, and the active regeneration decarbonization amount;

[0030] Taking the sum of the current DPF model carbon loading and the second DPF model carbon loading increase value as the target DPF model carbon loading.

[0031] In a possible implementation, calculating the second passive regeneration decarbonization amount based on the second NO2 occupancy ratio after the current DOC includes:

[0032] Calculating a second passive regeneration decarbonization rate based on the second NO2 occupancy ratio after the current DOC;

[0033] Taking the product of the second passive regeneration decarbonization rate and a preset duration as the second passive regeneration decarbonization amount.

[0034] In a second aspect, the present application further provides a device for determining the DPF model carbon loading, including:

[0035] A determination module, configured to, when it is determined that the far post-injection is enabled, determine a first NO2 occupancy ratio after the current DOC corresponding to the current DOC temperature and the current DOC airspeed in a first preset correspondence;

[0036] A calculation module, configured to calculate a first passive regeneration decarbonization amount based on the first NO2 occupancy ratio after the current DOC; calculate a first DPF model carbon loading increase value based on the carbon deposit amount, the first passive regeneration decarbonization amount, and the active regeneration decarbonization amount; and take the sum of the current DPF model carbon loading and the first DPF model carbon loading increase value as the target DPF model carbon loading.

[0037] In a possible implementation, the calculation module is specifically configured to:

[0038] Calculate a first passive regeneration decarbonization rate based on the NO2 occupancy ratio after the first DOC;

[0039] Use the product of the first passive regeneration decarbonization rate and a preset time duration as the first passive regeneration decarbonization amount.

[0040] In a possible implementation, the calculation module is specifically configured to:

[0041] Determine a second NO2 occupancy ratio corresponding to the current DOC temperature and the current DOC space velocity in a second preset correspondence;

[0042] Calculate a correction factor based on the second NO2 occupancy ratio after the second DOC and the NO2 occupancy ratio after the first DOC;

[0043] Calculate the first passive regeneration decarbonization amount based on a second passive regeneration decarbonization rate and the correction factor, where the second passive regeneration decarbonization rate is calculated based on the second NO2 occupancy ratio after the second DOC.

[0044] In a possible implementation, the calculation module is specifically configured to:

[0045] Calculate the ratio of the NO2 occupancy ratio after the first DOC to the NO2 occupancy ratio after the second DOC;

[0046] Use the calculated ratio as the correction factor.

[0047] In a possible implementation, the calculation module is specifically configured to:

[0048] Use the product of the second passive regeneration decarbonization rate and the correction factor as the first passive regeneration decarbonization rate;

[0049] Use the product of the first passive regeneration decarbonization rate and a preset time duration as the first passive regeneration decarbonization amount.

[0050] In a possible implementation, the calculation module is specifically configured to:

[0051] Calculate a first difference between the carbon deposit amount and the first passive regeneration decarbonization amount;

[0052] Use a second difference between the first difference and the active regeneration decarbonization amount as the first DPF model carbon load increase value.

[0053] In a possible implementation, the determination module is further configured to:

[0054] When it is determined that the far post-injection is not enabled, in the second preset correspondence, determine the second NO2 occupancy ratio after the DOC corresponding to the current DOC temperature and the current DOC airspeed;

[0055] The calculation module is further configured to:

[0056] Based on the second NO2 occupancy ratio after the DOC, calculate the second passive regeneration decarbonization amount; based on the carbon deposit amount, the second passive regeneration decarbonization amount, and the active regeneration decarbonization amount, calculate the second DPF model carbon loading increase value; use the sum of the current DPF model carbon loading and the second DPF model carbon loading increase value as the target DPF model carbon loading.

[0057] In a possible implementation manner, the calculation module is specifically configured to:

[0058] Based on the second NO2 occupancy ratio after the DOC, calculate the second passive regeneration decarbonization rate;

[0059] Use the product of the second passive regeneration decarbonization rate and the preset duration as the second passive regeneration decarbonization amount.

[0060] In a third aspect, the present application further provides an electronic device, including:

[0061] A memory for storing a computer program;

[0062] A processor, when executing the computer program stored on the memory, implements the following steps:

[0063] When it is determined that the far post-injection is enabled, in the first preset correspondence, determine the first NO2 occupancy ratio after the DOC corresponding to the current DOC temperature and the current DOC airspeed;

[0064] Based on the first NO2 occupancy ratio after the DOC, calculate the first passive regeneration decarbonization amount;

[0065] Based on the carbon deposit amount, the first passive regeneration decarbonization amount, and the active regeneration decarbonization amount, calculate the first DPF model carbon loading increase value;

[0066] Use the sum of the current DPF model carbon loading and the first DPF model carbon loading increase value as the target DPF model carbon loading.

[0067] In a possible implementation manner, the processor is specifically configured to:

[0068] Based on the first NO2 occupancy ratio after the DOC, calculate the first passive regeneration decarbonization rate;

[0069] Multiply the first passive regeneration decarbonization rate by a preset duration to obtain the first passive regeneration decarbonization amount.

[0070] In one possible implementation, the processor is specifically configured to:

[0071] In a second preset correspondence, determine the NO2 occupancy ratio after the second DOC corresponding to the current DOC temperature and the current DOC space velocity;

[0072] Calculate a correction factor based on the NO2 occupancy ratio after the second DOC and the NO2 occupancy ratio after the first DOC;

[0073] Calculate the first passive regeneration decarbonization amount based on the second passive regeneration decarbonization rate and the correction factor, where the second passive regeneration decarbonization rate is calculated based on the NO2 occupancy ratio after the second DOC.

[0074] In one possible implementation, the processor is specifically configured to:

[0075] Calculate the ratio of the NO2 occupancy ratio after the first DOC to the NO2 occupancy ratio after the second DOC;

[0076] Use the calculated ratio as the correction factor.

[0077] In one possible implementation, the processor is specifically configured to:

[0078] Multiply the second passive regeneration decarbonization rate by the correction factor to obtain the first passive regeneration decarbonization rate;

[0079] Multiply the first passive regeneration decarbonization rate by a preset duration to obtain the first passive regeneration decarbonization amount.

[0080] In one possible implementation, the processor is specifically configured to:

[0081] Calculate the first difference between the carbon deposition amount and the first passive regeneration decarbonization amount;

[0082] Use the second difference between the first difference and the active regeneration decarbonization amount as the first DPF model carbon loading increase value.

[0083] In one possible implementation, the processor is further configured to:

[0084] When it is determined that the far post-injection is not enabled, in the second preset correspondence, determine the NO2 occupancy ratio after the second DOC corresponding to the current DOC temperature and the current DOC space velocity;

[0085] Calculate the carbon consumption for the second passive regeneration based on the NO2 occupancy ratio after the second DOC;

[0086] Calculate the increase in the carbon loading of the second DPF model based on the carbon deposit amount, the carbon consumption for the second passive regeneration, and the carbon consumption for the active regeneration;

[0087] Use the sum of the current DPF model carbon loading and the increase in the carbon loading of the second DPF model as the target DPF model carbon loading.

[0088] In a possible implementation, the processor is specifically configured to:

[0089] Calculate the carbon consumption rate for the second passive regeneration based on the NO2 occupancy ratio after the second DOC;

[0090] Use the product of the carbon consumption rate for the second passive regeneration and a preset time duration as the carbon consumption for the second passive regeneration.

[0091] The beneficial effects of the present invention are as follows:

[0092] A method, apparatus, and electronic device for determining the carbon loading of a DPF model provided in the present application. The method includes: when it is determined that the far post-injection is enabled, first determine the first NO2 occupancy ratio after the DOC corresponding to the current DOC temperature and the current DOC space velocity in a first preset correspondence relationship, then calculate the carbon consumption for the first passive regeneration based on the first NO2 occupancy ratio after the DOC, calculate the increase in the carbon loading of the first DPF model based on the carbon deposit amount, the carbon consumption for the first passive regeneration, and the carbon consumption for the active regeneration, and finally use the sum of the current DPF model carbon loading and the increase in the carbon loading of the first DPF model as the target DPF model carbon loading. Since the carbon consumption for the first passive regeneration is calculated based on the first NO2 occupancy ratio after the DOC corresponding to the current DOC temperature and the current DOC space velocity, compared with calculating the carbon consumption for the passive regeneration using the theoretical NO2 occupancy ratio, the accuracy of the DPF model carbon loading can be improved, and the probability of the DPF being blocked or burned can be reduced. Description of the Drawings

[0093] To more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present invention, and those of ordinary skill in the art can also obtain other drawings without creative efforts based on these drawings.

[0094] Figure 1 It is a schematic structural diagram of a diesel engine after-treatment system provided by an embodiment of the present application;

[0095] Figure 2Schematic flow chart of a method for determining the carbon loading of a DPF model provided by an embodiment of the present application;

[0096] Figure 3 Schematic flow chart of another method for determining the carbon loading of a DPF model provided by an embodiment of the present application;

[0097] Figure 4 Schematic flow chart of another method for determining the carbon loading of a DPF model provided by an embodiment of the present application;

[0098] Figure 5 Schematic structural diagram of a device for determining the carbon loading of a DPF model provided by an embodiment of the present application;

[0099] Figure 6 Schematic structural diagram of an electronic device provided by an embodiment of the present application. Detailed implementation manners

[0100] In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0101] For the convenience of description, some nouns or terms related to the embodiments of the present application are explained below:

[0102] DOC: Oxidation catalytic converter, installed in front of the DPF, used to oxidize NO (nitric oxide) in the exhaust gas to NO2 (nitrogen dioxide), and at the same time increase the exhaust gas temperature to assist the normal operation of the DPF and SCR.

[0103] DPF: Particulate matter trap, used to trap particulate matter in the exhaust gas. When the amount of particulate matter trapped reaches a certain level, passive regeneration or active regeneration is required to restore the particulate matter trapping ability of the DPF.

[0104] DOC front temperature sensor: Arranged on the exhaust pipe in front of the DOC to measure the exhaust gas temperature in front of the DOC.

[0105] DPF front temperature sensor: Arranged on the exhaust pipe in front of the DPF to measure the exhaust gas temperature in front of the DPF, and estimate the DPF model carbon deposit amount and HC (hydrocarbon) injection amount during regeneration through this temperature.

[0106] DPF regeneration: Utilize the principle of the reaction between NO2 and C (carbon) generated in the DOC to eliminate C in the DPF.

[0107] DOC space velocity: The velocity of the exhaust gas flowing through the DOC.

[0108] As shown Figure 1 in the figure, it is a schematic structural diagram of a diesel engine aftertreatment system provided by an embodiment of the present application. It can be seen from Figure 1 the figure that the aftertreatment system includes a DOC pre-temperature sensor T1, a DOC, a DPF pre-temperature sensor T2, a DPF, an SCR pre-temperature sensor T3, an SCR, an ASR, and an SCR post-temperature sensor T4.

[0109] The exhaust gas flows from Figure 1 the right side to the left side of the diesel engine aftertreatment system shown in the figure. The exhaust gas sequentially passes through the DOC, the DPF, the SCR, and the ASR. The DOC pre-temperature sensor T1 is arranged on the exhaust pipe before the DOC, and the DPF pre-temperature sensor T2 is arranged on the exhaust pipe before the DPF.

[0110] Next, a method for determining the carbon loading of a DPF model provided by an embodiment of the present application will be described in detail with reference to the accompanying drawings.

[0111] As shown Figure 2 in the figure, it is a method for determining the carbon loading of a DPF model provided by an embodiment of the present application, which specifically includes the following steps:

[0112] S201. When it is determined that the far post-injection is turned on, in the first preset correspondence relationship, determine the first NO2 occupancy ratio after the DOC corresponding to the current DOC temperature and the current DOC space velocity;

[0113] S202. Calculate the first passive regeneration carbon consumption based on the first NO2 occupancy ratio after the DOC;

[0114] S203. Calculate the first DPF model carbon loading increase value based on the carbon deposit amount, the first passive regeneration carbon consumption, and the active regeneration carbon consumption;

[0115] S204. Use the sum of the current DPF model carbon loading and the first DPF model carbon loading increase value as the target DPF model carbon loading.

[0116] In the embodiment of the present application, when it is determined to turn on the far post-injection, first, in the first preset correspondence, determine the first NO2 occupancy ratio after DOC corresponding to the current DOC temperature and the current DOC airspeed. Then, based on the first NO2 occupancy ratio after DOC, calculate the first passive regeneration decarbonization amount. Based on the carbon deposit amount, the first passive regeneration decarbonization amount, and the active regeneration decarbonization amount, calculate the increased value of the first DPF model carbon loading. Finally, take the sum of the current DPF model carbon loading and the increased value of the first DPF model carbon loading as the target DPF model carbon loading. Since the first passive regeneration decarbonization amount is calculated based on the first NO2 occupancy ratio after DOC corresponding to the current DOC temperature and the current DOC airspeed, compared with calculating the passive regeneration decarbonization amount using the theoretical NO2 occupancy ratio, the accuracy of the DPF model carbon loading can be improved, and the probability of the DPF being blocked or burned can be reduced.

[0117] The first preset correspondence in the embodiment of the present application is the correspondence among the DOC temperature, the DOC airspeed, and the first NO2 occupancy ratio after DOC. The first preset correspondence can be generated based on a large amount of experimental data and can be displayed in the form of a chart, as shown in Table 1 below.

[0118]

[0119] Table 1

[0120] When it is determined to turn on the far post-injection, determine the first NO2 occupancy ratio after DOC corresponding to the current DOC temperature and the current DOC airspeed from Table 1. For example, if the current DOC temperature is a1 and the current DOC airspeed is b1, then by looking up Table 1, the first NO2 occupancy ratio after DOC is c1.

[0121] In the embodiment of the present application, the current DOC temperature can be collected by Figure 1 the DOC front temperature sensor T1 therein, and the current DOC airspeed, that is, the speed of the exhaust gas flowing through the DOC, can be calculated by the ECU (Electronic Control Unit).

[0122] In one embodiment, it can be determined whether to turn on the far post-injection by the injection quantity q of the far post-injection. When the injection quantity q of the far post-injection > 0, it is determined to turn on the far post-injection. When the injection quantity q of the far post-injection = 0, it is determined not to turn on the far post-injection.

[0123] When it is determined to turn on the far post-injection and the first NO2 occupancy ratio after DOC is determined, based on the first NO2 occupancy ratio after DOC, calculate the first passive regeneration decarbonization amount. Specifically, first calculate the first passive regeneration decarbonization rate based on the first NO2 occupancy ratio after DOC, and then take the product of the first passive regeneration decarbonization rate and the preset duration as the first passive regeneration decarbonization amount.

[0124] In one embodiment, the first passive regeneration decarbonization rate = NOx mass flow rate × percentage of NO2 after the first DOC × (decarbonization correction coefficient based on carbon loading) × (correction coefficient based on DPF exhaust temperature and DPF space velocity) × (fixed carbon / NO2 coefficient).

[0125] Among them, the NOx mass flow rate can be measured by a nitrogen oxide sensor and calculated by the ECU, and can also be obtained by looking up a table. If it is obtained by looking up a table, the table includes the corresponding relationship between the engine speed, the cyclic fuel supply amount, and the NOx mass flow rate. According to the current engine speed and the cyclic fuel supply amount, the NOx mass flow rate corresponding to the current engine speed and the cyclic fuel supply amount is found in the table. The current engine speed and the cyclic fuel supply amount can be obtained by sensors on the engine and calculated by the ECU;

[0126] The decarbonization correction coefficient based on carbon loading can be obtained by looking up a table. Specifically, the table includes the carbon loading and the decarbonization correction coefficient based on carbon loading. According to the current carbon loading, the decarbonization correction coefficient based on carbon loading corresponding to the current carbon loading is found in the table. The current carbon loading is the current carbon loading of the DPF;

[0127] The correction coefficient based on DPF exhaust temperature and DPF space velocity can be obtained by looking up a table. Specifically, the table includes the corresponding relationship between the DPF exhaust temperature, the DPF space velocity, and the correction coefficient. According to the current DPF exhaust temperature and the current DPF space velocity, the correction coefficient corresponding to the current DPF exhaust temperature and the current DPF space velocity is found in the table. The found correction coefficient is the correction coefficient based on DPF exhaust temperature and DPF space velocity;

[0128] The fixed carbon / NO2 coefficient is a preset value, which is the ratio of the unit weight to the weight of NO2. The weight of NO2 is the weight of NO2 used in the complete reaction of the unit weight of carbon and NO2.

[0129] It should be noted that the DPF exhaust temperature is Figure 1 the temperature collected by the temperature sensor T2 before the DPF in , and the DPF space velocity, that is, the velocity of the exhaust gas flowing through the DPF, can be calculated by the ECU.

[0130] It should be noted that the preset duration in the embodiments of the present application can be the interval duration for determining the carbon loading of the DPF model. For example, if the DPF model carbon loading is determined once every 1 s (second), the preset duration is 1 s.

[0131] In one embodiment, based on the carbon deposit amount, the first passive regeneration decarbonization amount, and the active regeneration decarbonization amount, the increase value of the first DPF model carbon loading is calculated. Specifically, the first difference between the carbon deposit amount and the first passive regeneration decarbonization amount is calculated; the second difference between the first difference and the active regeneration decarbonization amount is used as the increase value of the first DPF model carbon loading.

[0132] Among them, the carbon deposit amount is obtained based on the carbon deposit rate and a preset duration. Specifically, the product of the carbon deposit rate and the preset duration is used as the carbon deposit amount.

[0133] In a specific implementation, the carbon deposit rate is calculated in the following manner:

[0134] Carbon deposit rate = (model value of the original carbon emission based on the working condition) × (coefficient based on the change in the excess air coefficient);

[0135] Among them, the model value of the original carbon emission based on the working condition can be obtained by looking up a table. This table includes the correspondence between the working condition and the model value of the original carbon emission based on the working condition. According to the current working condition, the model value of the original carbon emission based on the working condition corresponding to the current working condition is found from this table;

[0136] The coefficient based on the change in the excess air coefficient is obtained through calculation. The difference between the actual excess air coefficient and the theoretical excess air coefficient is used as the coefficient based on the change in the excess air coefficient. The actual excess air coefficient can be calculated by the ECU. The ECU can calculate the actual excess air coefficient based on the intake air volume, and the theoretical excess air coefficient is a preset value.

[0137] The active regeneration carbon elimination amount is obtained based on the active regeneration carbon elimination rate and a preset duration. Specifically, the product of the active regeneration carbon elimination rate and the preset duration is used as the active regeneration carbon elimination amount.

[0138] In a specific implementation, the active regeneration carbon elimination rate is calculated in the following manner:

[0139] Active regeneration carbon elimination rate = (correction coefficient based on the DPF exhaust temperature and DPF space velocity) × (model value of the active regeneration carbon elimination rate based on the carbon loading) × (correction coefficient based on the excess air coefficient).

[0140] Among them, the correction coefficient based on the DPF exhaust temperature and DPF space velocity can be obtained by looking up a table. Specifically, this table includes the correspondence between the DPF exhaust temperature, DPF space velocity, and the correction coefficient. According to the current DPF exhaust temperature and the current DPF space velocity, the correction coefficient corresponding to the current DPF exhaust temperature and the current DPF space velocity is found from this table. The found correction coefficient is the correction coefficient based on the DPF exhaust temperature and DPF space velocity;

[0141] The model value of the active regeneration carbon elimination rate based on the carbon loading can be obtained by looking up a table. Specifically, this table includes the correspondence between the current DPF carbon deposit amount and the model value of the active regeneration carbon elimination rate. According to the current DPF carbon deposit amount, the model value of the active regeneration carbon elimination rate corresponding to the current DPF carbon deposit amount is found from this table. The found model value of the active regeneration carbon elimination rate is used as the model value of the active regeneration carbon elimination rate based on the carbon loading;

[0142] The correction coefficient based on the excess air coefficient can be obtained by looking up a table. Specifically, the table includes the corresponding relationship between the excess air coefficient and the correction coefficient. According to the current excess air coefficient, the correction coefficient corresponding to the current excess air coefficient is found in the table, and the found correction coefficient is used as the correction coefficient based on the excess air coefficient. The current excess air coefficient can be calculated by the ECU based on the intake air volume.

[0143] After calculating the increase value of the carbon loading of the first DPF model, the sum of the current DPF model carbon loading and the increase value of the first DPF model carbon loading is used as the target DPF model carbon loading.

[0144] In the above embodiment, when it is determined that the post-injection is turned on, since the first passive regeneration decarbonization amount is calculated based on the first NO2 occupancy ratio after the DOC corresponding to the current DOC temperature and the current DOC space velocity, compared with calculating the passive regeneration decarbonization amount using the theoretical NO2 occupancy ratio, the accuracy of the DPF model carbon loading can be improved, and the probability of the DPF being blocked or burned can be reduced.

[0145] In another embodiment, when it is determined that the post-injection is not turned on, in the second preset corresponding relationship, the second NO2 occupancy ratio after the DOC corresponding to the current DOC temperature and the current DOC space velocity is determined; based on the second NO2 occupancy ratio after the DOC, the second passive regeneration decarbonization amount is calculated; based on the carbon deposit amount, the second passive regeneration decarbonization amount, and the active regeneration decarbonization amount, the increase value of the second DPF model carbon loading is calculated; the sum of the current DPF model carbon loading and the increase value of the second DPF model carbon loading is used as the target DPF model carbon loading.

[0146] The second preset corresponding relationship in the embodiment of the present application is the corresponding relationship between the DOC temperature, the DOC space velocity, and the second NO2 occupancy ratio after the DOC. The second preset corresponding relationship can be generated based on a large amount of experimental data and can be displayed in the form of a chart as shown in Table 2 below.

[0147]

[0148] Table 2

[0149] When it is determined that the post-injection is not turned on, the second NO2 occupancy ratio after the DOC corresponding to the current DOC temperature and the current DOC space velocity is determined from Table 2. For example, if the current DOC temperature is a1 and the current DOC space velocity is b1, then by looking up Table 2, the second NO2 occupancy ratio after the DOC is c4.

[0150] In a specific implementation, it is determined whether the post-injection is turned on by the injection quantity q of the post-injection. If it is determined that the injection quantity q of the post-injection is 0, then it is determined that the post-injection is not turned on.

[0151] When it is determined that the long after-injection is not enabled and the NO₂ occupancy ratio after the second DOC is determined, based on the NO₂ occupancy ratio after the second DOC, the carbon consumption amount of the second passive regeneration is calculated. Specifically, first, based on the NO₂ occupancy ratio after the second DOC, the carbon consumption rate of the second passive regeneration is calculated, and then the product of the second passive carbon consumption rate and the preset duration is used as the carbon consumption amount of the second passive regeneration.

[0152] In one embodiment, the carbon consumption rate of the second passive regeneration = NOₓ mass flow × NO₂ occupancy ratio after the second DOC × (carbon consumption correction coefficient based on carbon loading) × (correction coefficient based on DPF exhaust temperature and DPF space velocity) × (fixed carbon / NO₂ coefficient).

[0153] Among them, the specific meanings of the NOₓ mass flow, the carbon consumption correction coefficient based on carbon loading, the correction coefficient based on DPF exhaust temperature and DPF space velocity, and the fixed carbon / NO₂ coefficient can refer to the specific meanings of the NOₓ mass flow, the carbon consumption correction coefficient based on carbon loading, the correction coefficient based on DPF exhaust temperature and DPF space velocity, and the fixed carbon / NO₂ coefficient in calculating the carbon consumption rate of the first passive regeneration in the above embodiment, which will not be repeated here.

[0154] After calculating the carbon consumption amount of the second passive regeneration, based on the carbon deposit amount, the carbon consumption amount of the second passive regeneration, and the carbon consumption amount of the active regeneration, the carbon loading increase value of the second DPF model is calculated. Specifically, the third difference between the carbon deposit amount and the carbon consumption amount of the second passive regeneration is calculated; the fourth difference between the third difference and the carbon consumption amount of the active regeneration is used as the carbon loading increase value of the second DPF model, and the sum of the current DPF model carbon loading and the carbon loading increase value of the second DPF model is used as the target DPF model carbon loading.

[0155] In the embodiment of the present application, the calculation of the carbon deposit amount and the carbon consumption amount of the active regeneration can refer to the calculation of the carbon loading and the carbon consumption amount of the active regeneration when calculating the carbon loading increase value of the first DPF model in the above embodiment, which will not be repeated here.

[0156] In the above embodiment, when it is determined that the long after-injection is not enabled, since the carbon consumption amount of the second passive regeneration is calculated based on the NO₂ occupancy ratio after the second DOC corresponding to the current DOC temperature and the current DOC space velocity, compared with calculating the carbon consumption amount of the passive regeneration using the theoretical NO₂ occupancy ratio, the accuracy of the DPF model carbon loading can be improved, and the probability of the DPF being blocked or burned can be reduced.

[0157] As Figure 3 shown, it is a schematic flowchart of a method for determining the DPF model carbon loading provided by the embodiment of the present application, which specifically includes the following steps:

[0158] S301. Obtain the injection quantity q of the long after-injection, the current DOC temperature, and the current DOC space velocity;

[0159] S302. Determine that the fuel injection quantity q of the far post-injection is greater than 0;

[0160] S303. Determine to turn on the far post-injection;

[0161] S304. In the first preset correspondence, determine the first NO2 occupancy ratio after the DOC corresponding to the current DOC temperature and the current DOC airspeed;

[0162] S305. Calculate the first passive regeneration decarbonization rate based on the first NO2 occupancy ratio after the DOC;

[0163] S306. Calculate the first passive regeneration decarbonization amount based on the first passive regeneration decarbonization rate;

[0164] S307. Calculate the first difference between the carbon deposit amount and the first passive regeneration decarbonization amount, calculate the second difference between the first difference and the active regeneration decarbonization amount, and use the second difference as the first DPF model carbon loading increase value;

[0165] S308. Use the sum of the current DPF model carbon loading and the first DPF model carbon loading increase value as the target DPF model carbon loading;

[0166] S309. Determine that the fuel injection quantity q of the far post-injection is equal to 0;

[0167] S310. Determine that the far post-injection is not turned on;

[0168] S311. In the second preset correspondence, determine the second NO2 occupancy ratio after the DOC corresponding to the current DOC temperature and the current DOC airspeed;

[0169] S312. Calculate the second passive regeneration decarbonization rate based on the second NO2 occupancy ratio after the DOC;

[0170] S313. Calculate the second passive regeneration decarbonization amount based on the second passive regeneration decarbonization rate;

[0171] S314. Calculate the third difference between the carbon deposit amount and the second passive regeneration decarbonization amount, calculate the fourth difference between the third difference and the active regeneration decarbonization amount, and use the fourth difference as the second DPF model carbon loading increase value;

[0172] S315. Use the sum of the current DPF model carbon loading and the second DPF model carbon loading increase value as the target DPF model carbon loading.

[0173] In one embodiment, when it is determined to turn on the far post-injection, after determining the first post-DOC NO2 occupancy ratio corresponding to the current DOC temperature and the current DOC airspeed, in the second corresponding relationship, determine the second post-DOC NO2 occupancy ratio corresponding to the current DOC temperature and the current DOC airspeed, calculate a correction factor based on the second post-DOC NO2 occupancy ratio and the first post-DOC NO2 occupancy ratio, and calculate the second passive regeneration decarbonization rate based on the second post-DOC NO2 occupancy ratio. Finally, calculate the first passive regeneration decarbonization amount based on the second passive regeneration decarbonization rate and the correction factor. After calculating the first passive regeneration decarbonization amount, calculate the first DPF model carbon loading increase value based on the carbon deposit amount, the calculated first passive regeneration decarbonization amount, and the active regeneration decarbonization amount. Finally, use the sum of the current DPF model carbon loading and the calculated first DPF model carbon loading increase value as the target DPF model carbon loading.

[0174] Specifically, use the ratio of the first post-DOC NO2 occupancy ratio to the second post-DOC NO2 occupancy ratio as the correction factor.

[0175] For example, if the first post-DOC NO2 occupancy ratio is B and the second post-DOC NO2 occupancy ratio is A, then the correction factor μ = B / A.

[0176] After calculating the correction factor, calculate the first passive regeneration decarbonization rate based on the second passive regeneration decarbonization rate and the correction factor, and use the product of the first passive regeneration decarbonization rate and the preset duration as the first passive regeneration decarbonization amount.

[0177] Specifically, calculate the first passive regeneration decarbonization rate based on the second passive regeneration decarbonization rate and the correction factor, and use the product of the second passive regeneration decarbonization rate and the correction factor as the first passive regeneration decarbonization rate.

[0178] The first passive regeneration decarbonization rate = the second passive regeneration decarbonization rate × μ.

[0179] The second passive regeneration decarbonization rate = NOx mass flow × the second post-DOC NO2 occupancy ratio × (decarbonization correction coefficient based on carbon loading) × (correction coefficient based on DPF exhaust temperature and DPF airspeed) × (fixed carbon / NO2 coefficient).

[0180] Where, μ is the correction factor;

[0181] For the specific meanings of the NOx mass flow, the decarbonization correction coefficient based on carbon loading, the correction coefficient based on DPF exhaust temperature and DPF airspeed, and the fixed carbon / NO2 coefficient, reference can be made to the specific meanings of the NOx mass flow, the decarbonization correction coefficient based on carbon loading, the correction coefficient based on DPF exhaust temperature and DPF airspeed, and the fixed carbon / NO2 coefficient in the calculation of the first passive regeneration decarbonization rate in the above embodiment, and details will not be repeated here.

[0182] It should be noted that when the far post-injection is not enabled, the correction factor is equal to 1.

[0183] As Figure 4 shown, it is a schematic flowchart of another method for determining the carbon loading of the DPF model provided by the embodiment of the present application, which specifically includes the following steps:

[0184] S401. Obtain the injection quantity q of the far post-injection, the current DOC temperature, and the current DOC space velocity;

[0185] S402. Determine that the injection quantity q of the far post-injection is greater than 0;

[0186] S403. Determine that the far post-injection is enabled;

[0187] S404. In the first preset correspondence, determine the first NO2 occupancy ratio after DOC corresponding to the current DOC temperature and the current DOC space velocity, and in the second preset correspondence, determine the second NO2 occupancy ratio after DOC corresponding to the current DOC temperature and the current DOC space velocity;

[0188] S405. Take the ratio of the first NO2 occupancy ratio after DOC to the second NO2 occupancy ratio after DOC as the correction factor, and calculate the second passive regeneration decarbonization rate based on the second NO2 occupancy ratio after DOC;

[0189] S406. Calculate the first passive regeneration decarbonization rate based on the second passive regeneration decarbonization rate and the correction factor;

[0190] S407. Take the product of the first passive regeneration decarbonization rate and the preset duration as the first passive regeneration decarbonization amount;

[0191] S408. Calculate the first difference between the carbon deposit amount and the first passive regeneration decarbonization amount, calculate the second difference between the first difference and the active regeneration decarbonization amount, and take the second difference as the first DPF model carbon loading increase value;

[0192] S409. Take the sum of the current DPF model carbon loading and the first DPF model carbon loading increase value as the target DPF model carbon loading.

[0193] In the embodiment of the present application, based on the ratio of the first NO2 occupancy ratio after DOC to the second NO2 occupancy ratio after DOC as the correction factor, the correction factor is used to correct the second passive regeneration decarbonization rate to obtain the first passive regeneration decarbonization rate, so as to improve the accuracy of the DPF model carbon loading and reduce the probability of the DPF being blocked or burned.

[0194] Based on the same inventive concept, an embodiment of the present application further provides a device for determining the carbon loading of a DPF model. The principle of solving technical problems by the device for determining the carbon loading of a DPF model is similar to that of the above method for determining the carbon loading of a DPF model. The implementation of the device can refer to the implementation of the method, and the repeated parts will not be described again.

[0195] As Figure 5 shown, it is a schematic structural diagram of a device for determining the carbon loading of a DPF model provided by the present application. The device includes:

[0196] A determination module 501, configured to determine a first DOC post-NO2 occupancy ratio corresponding to the current DOC temperature and the current DOC airspeed in a first preset correspondence relationship when it is determined that the far post-injection is turned on;

[0197] A calculation module 502, configured to calculate a first passive regeneration carbon consumption amount based on the first DOC post-NO2 occupancy ratio; calculate a first DPF model carbon loading increase value based on the carbon deposit amount, the first passive regeneration carbon consumption amount, and the active regeneration carbon consumption amount; and use the sum of the current DPF model carbon loading and the first DPF model carbon loading increase value as the target DPF model carbon loading.

[0198] In one embodiment, the calculation module 502 is specifically configured to:

[0199] Calculate a first passive regeneration carbon consumption rate based on the first DOC post-NO2 occupancy ratio;

[0200] Use the product of the first passive regeneration carbon consumption rate and a preset duration as the first passive regeneration carbon consumption amount.

[0201] In one embodiment, the calculation module 502 is specifically configured to:

[0202] Determine a second DOC post-NO2 occupancy ratio corresponding to the current DOC temperature and the current DOC airspeed in a second preset correspondence relationship;

[0203] Calculate a correction factor based on the second DOC post-NO2 occupancy ratio and the first DOC post-NO2 occupancy ratio;

[0204] Calculate the first passive regeneration carbon consumption amount based on a second passive regeneration carbon consumption rate and the correction factor, where the second passive regeneration carbon consumption rate is calculated based on the second DOC post-NO2 occupancy ratio.

[0205] In one embodiment, the calculation module 502 is specifically configured to:

[0206] Calculate the ratio of the first DOC post-NO2 occupancy ratio to the second DOC post-NO2 occupancy ratio;

[0207] Use the calculated ratio as the correction factor.

[0208] In one embodiment, the calculation module 502 is specifically configured to:

[0209] Use the product of the second passive regeneration decarbonization rate and the correction factor as the first passive regeneration decarbonization rate;

[0210] Use the product of the first passive regeneration decarbonization rate and a preset duration as the first passive regeneration decarbonization amount.

[0211] In one embodiment, the calculation module 502 is specifically configured to:

[0212] Calculate a first difference between the carbon deposit amount and the first passive regeneration decarbonization amount;

[0213] Use the second difference between the first difference and the active regeneration decarbonization amount as the first DPF model carbon loading increase value.

[0214] In one embodiment, the determination module 501 is further configured to:

[0215] When it is determined that the far post-injection is not enabled, in the second preset correspondence, determine the second DOC post-NO2 occupancy ratio corresponding to the current DOC temperature and the current DOC space velocity;

[0216] The calculation module 502 is further configured to:

[0217] Calculate the second passive regeneration decarbonization amount based on the second DOC post-NO2 occupancy ratio;

[0218] Calculate the second DPF model carbon loading increase value based on the carbon deposit amount, the second passive regeneration decarbonization amount, and the active regeneration decarbonization amount;

[0219] Use the sum of the current DPF model carbon loading and the second DPF model carbon loading increase value as the target DPF model carbon loading.

[0220] In one embodiment, the calculation module 502 is specifically configured to:

[0221] Calculate the second passive regeneration decarbonization rate based on the second DOC post-NO2 occupancy ratio;

[0222] Use the product of the second passive regeneration decarbonization rate and a preset duration as the second passive regeneration decarbonization amount.

[0223] Based on the same inventive concept, an embodiment of the present application further provides an electronic device. The principle of the electronic device for solving technical problems is similar to the principle of the above method for determining the carbon loading of the DPF model. The implementation of the electronic device can refer to the implementation of the method, and the repeated parts will not be elaborated here.

[0224] As Figure 6 shown, it is a schematic structural diagram of an electronic device provided by the present application. The electronic device includes:

[0225] A memory 601 for storing a computer program;

[0226] A processor 602, when executing the computer program stored in the memory, implements the following steps:

[0227] When it is determined to turn on the far post-injection, in the first preset correspondence, determine the first NO2 occupancy ratio after DOC corresponding to the current DOC temperature and the current DOC space velocity;

[0228] Based on the first NO2 occupancy ratio after DOC, calculate the first passive regeneration decarbonization amount;

[0229] Based on the carbon deposit amount, the first passive regeneration decarbonization amount, and the active regeneration decarbonization amount, calculate the first DPF model carbon loading increase value;

[0230] Take the sum of the current DPF model carbon loading and the first DPF model carbon loading increase value as the target DPF model carbon loading.

[0231] In one embodiment, the processor 602 is specifically configured to:

[0232] Based on the first NO2 occupancy ratio after DOC, calculate the first passive regeneration decarbonization rate;

[0233] Take the product of the first passive regeneration decarbonization rate and the preset time duration as the first passive regeneration decarbonization amount.

[0234] In one embodiment, the processor 602 is specifically configured to:

[0235] In the second preset correspondence, determine the second NO2 occupancy ratio after DOC corresponding to the current DOC temperature and the current DOC space velocity;

[0236] Based on the second NO2 occupancy ratio after DOC and the first NO2 occupancy ratio after DOC, calculate a correction factor;

[0237] Based on the second passive regeneration decarbonization rate and the correction factor, calculate the first passive regeneration decarbonization amount, where the second passive regeneration decarbonization rate is calculated based on the second NO2 occupancy ratio after DOC.

[0238] In one embodiment, the processor 602 is specifically configured to:

[0239] Calculate the ratio of the NO2 occupancy ratio after the first DOC to the NO2 occupancy ratio after the second DOC;

[0240] Use the calculated ratio as the correction factor.

[0241] In one embodiment, the processor 602 is specifically configured to:

[0242] Use the product of the second passive regeneration decarbonization rate and the correction factor as the first passive regeneration decarbonization rate;

[0243] Use the product of the first passive regeneration decarbonization rate and a preset duration as the first passive regeneration decarbonization amount.

[0244] In one embodiment, the processor 602 is specifically configured to:

[0245] Calculate the first difference between the carbon deposit amount and the first passive regeneration decarbonization amount;

[0246] Use the second difference between the first difference and the active regeneration decarbonization amount as the first DPF model carbon loading increase value.

[0247] In one embodiment, the processor 602 is further configured to:

[0248] When it is determined that the far post-injection is not enabled, in the second preset correspondence, determine the NO2 occupancy ratio after the second DOC corresponding to the current DOC temperature and the current DOC space velocity;

[0249] Based on the NO2 occupancy ratio after the second DOC, calculate the second passive regeneration decarbonization amount;

[0250] Based on the carbon deposit amount, the second passive regeneration decarbonization amount, and the active regeneration decarbonization amount, calculate the second DPF model carbon loading increase value;

[0251] Use the sum of the current DPF model carbon loading and the second DPF model carbon loading increase value as the target DPF model carbon loading.

[0252] In one embodiment, the processor 602 is specifically configured to:

[0253] Based on the NO2 occupancy ratio after the second DOC, calculate the second passive regeneration decarbonization rate;

[0254] Use the product of the second passive regeneration decarbonization rate and a preset duration as the second passive regeneration decarbonization amount.

[0255] A method, device and electronic device for determining the carbon loading of a DPF model provided by the present application, when it is determined that the far post-injection is turned on, first, in the first preset correspondence, determine the first NO2 occupancy ratio after the DOC corresponding to the current DOC temperature and the current DOC space velocity, then, based on the first NO2 occupancy ratio after the DOC, calculate the first passive regeneration decarbonization amount, based on the carbon deposit amount, the first passive regeneration decarbonization amount and the active regeneration decarbonization amount, calculate the first increase value of the DPF model carbon loading, and finally, use the sum of the current DPF model carbon loading and the first increase value of the DPF model carbon loading as the target DPF model carbon loading. Since the first passive regeneration decarbonization amount is calculated based on the first NO2 occupancy ratio after the DOC corresponding to the current DOC temperature and the current DOC space velocity, compared with calculating the passive regeneration decarbonization amount using the theoretical NO2 occupancy ratio, the accuracy of the DPF model carbon loading can be improved, and the probability of the DPF being blocked or burned can be reduced.

[0256] The present application is described above with reference to the block diagrams and / or flowcharts showing methods, devices (systems) and / or computer program products according to embodiments of the present application. It should be understood that one block of the block diagrams and / or flowcharts and combinations of blocks in the block diagrams and / or flowcharts can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, and / or other programmable data processing devices to produce a machine, such that the instructions executed via the computer processor and / or other programmable data processing devices create a method for implementing the functions / actions specified in the blocks of the block diagrams and / or flowcharts.

[0257] Correspondingly, the present application can also be implemented by hardware and / or software (including firmware, resident software, microcode, etc.). Further, the present application can take the form of a computer program product on a computer-usable or computer-readable storage medium, which has computer-usable or computer-readable program code implemented in the medium for use by or in connection with an instruction execution system. In the context of the present application, the computer-usable or computer-readable medium can be any medium that can contain, store, communicate, transmit, or convey a program for use by or in connection with an instruction execution system, apparatus, or device.

[0258] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalent technologies, the present invention is also intended to include these changes and modifications.

Claims

1. A method for determining the carbon loading of a DPF model, characterized in that: The method comprises: When it is determined to start the remote post-injection, in the first preset correspondence, the first post-DOC NO2 ratio corresponding to the current DOC temperature and the current DOC airspeed is determined; Calculating the first passive regeneration carbon removal amount based on the first post-DOC NO2 percentage value; Calculating a first DPF model carbon load increase value based on the carbon deposit amount, the first passive regeneration carbon removal amount, and the active regeneration carbon removal amount; The sum of the current DPF model carbon load and the first DPF model carbon load increase value is used as the target DPF model carbon load; The calculation of the first passive regeneration carbon removal amount based on the first post-DOC NO2 ratio value includes: In the second preset corresponding relationship, determining a second post-DOC NO2 percentage value corresponding to the current DOC temperature and the current DOC airspeed; Calculating a correction factor based on the second post-DOC NO2 percentage value and the first post-DOC NO2 percentage value; The first passive regeneration carbon removal amount is calculated based on the second passive regeneration carbon removal rate and the correction factor, wherein the second passive regeneration carbon removal rate is calculated based on the second post-DOC NO2 proportion value.

2. The method according to claim 1, characterized in that The calculating of the first passive regeneration carbon removal amount based on the first post-DOC NO2 ratio value includes: Calculating a first passive regeneration carbon removal rate based on the first post-DOC NO2 percentage value; The product of the first passive regeneration carbon removal rate and the preset time length is used as the first passive regeneration carbon removal amount.

3. The method according to claim 1, characterized in that The calculating of the correction factor based on the second post-DOC NO2 proportion value and the first post-DOC NO2 proportion value comprises: Calculate the ratio of the first post-DOC NO2 percentage value to the second post-DOC NO2 percentage value; The calculated ratio is used as the correction factor.

4. The method according to claim 1, characterized in that The calculating the first passive regeneration carbon removal amount based on the second passive regeneration carbon removal rate and the correction factor comprises: The product of the second passive regeneration carbon removal rate and the correction factor is used as the first passive regeneration carbon removal rate; The product of the first passive regeneration carbon removal rate and the preset time length is used as the first passive regeneration carbon removal amount.

5. The method according to claim 1, characterized in that The calculating the first DPF model carbon load increase value based on the carbon deposit amount, the first passive regeneration carbon removal amount and the active regeneration carbon removal amount includes: Calculating a first difference between the carbon deposit amount and the first passive regeneration carbon removal amount; The first difference and the second difference between the active regeneration carbon removal amount are used as the first DPF model carbon load increase value.

6. The method according to claim 1, characterized in that The method further comprises: When it is determined that the remote post-injection is not turned on, in a second preset correspondence, a second post-DOC NO2 ratio value corresponding to the current DOC temperature and the current DOC airspeed is determined; Calculating the second passive regeneration carbon removal amount based on the second post-DOC NO2 percentage value; Calculating a second DPF model carbon load increase value based on the carbon deposit amount, the second passive regeneration carbon removal amount, and the active regeneration carbon removal amount; The sum of the current DPF model carbon load and the second DPF model carbon load increase value is used as the target DPF model carbon load.

7. The method according to claim 6, characterized in that The calculating of the second passive regeneration carbon removal amount based on the second post-DOC NO2 ratio value includes: Calculating the second passive regeneration carbon removal rate based on the second post-DOC NO2 percentage value; The product of the second passive regeneration carbon removal rate and the preset time length is used as the second passive regeneration carbon removal amount.

8. A device for determining the carbon loading of a DPF model, characterized in that: include: A determination module, for determining, in a first preset correspondence relationship, a first post-DOC NO2 ratio value corresponding to a current DOC temperature and a current DOC airspeed when it is determined that the remote post-injection is turned on; A calculation module, for calculating a first passive regeneration carbon removal amount based on the first post-DOC NO2 ratio; calculating a first DPF model carbon load increase value based on the carbon deposit amount, the first passive regeneration carbon removal amount and the active regeneration carbon removal amount; and taking the sum of the current DPF model carbon load and the first DPF model carbon load increase value as the target DPF model carbon load; Wherein, the calculation module is specifically used for: In the second preset corresponding relationship, determining a second post-DOC NO2 percentage value corresponding to the current DOC temperature and the current DOC airspeed; Calculating a correction factor based on the second post-DOC NO2 percentage value and the first post-DOC NO2 percentage value; The first passive regeneration carbon removal amount is calculated based on the second passive regeneration carbon removal rate and the correction factor, wherein the second passive regeneration carbon removal rate is calculated based on the second post-DOC NO2 proportion value.

9. An electronic device, characterized in that: include: Memory, used to store computer programs; A processor, configured to implement the method according to any one of claims 1 to 7 when executing a computer program stored in the memory.

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